What did Edison promise to his mother how did kept it?

Edison promised his mother that he would become a great inventor and make her proud. He kept this promise by dedicating himself to his work, inventing numerous groundbreaking technologies such as the phonograph and the electric light bulb. Throughout his career, he often credited his mother for inspiring his creativity and perseverance, reflecting her significant influence on his success. Edison's achievements not only fulfilled his promise but also left a lasting legacy in the world of innovation.